The Yamaha YST-SW515 is an advanced subwoofer that provides up to 270 watts of dynamic power.

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The Yamaha YST-SW515 is an advanced subwoofer that provides up to 270 watts of dynamic power. The subwoofer features Yamaha's advanced YST II technology in which the speaker and amplifier work together to cancel impedence and provide a high level of performance. It includes QD Bass technology for a down-firing driver placement that provides high power and a smooth frequency response. The subwoofer is designed with a 10" multi-range driver and a high-density MDF cabinet for reduced vibration and resonance. The YST-SW515 offers a frequency response of 20 to 160 Hz and includes a selectable high cut filter of 40 to 140 Hz. It features a high efficiency amplifier which delivers a high level of power output while minimizing power consumption. The subwoofer is also eco-friendly and has an auto standby feature, using only 0.5-watts of power once in standby mode. The subwoofer comes in a black finish and has a suggested retail price of $650.